:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --border: #e2e4e9;
  --text: #1c1e21;
  --text-muted: #6b7280;
  --primary: #7c3aed;
  --primary-dark: #6d28d9;
  --primary-light: #f3ebff;
  --danger: #dc2626;
  --danger-light: #fdecec;
  --warn: #d97706;
  --warn-light: #fef3e2;
  --ok: #16a34a;
  --ok-light: #e9f9ee;
  --radius: 10px;
  --sidebar-w: 220px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16171b;
    --surface: #1f2025;
    --border: #2e3038;
    --text: #eceef1;
    --text-muted: #9498a3;
    --primary: #a78bfa;
    --primary-dark: #8b5cf6;
    --primary-light: #2c2440;
    --danger: #f87171;
    --danger-light: #3a2323;
    --warn: #fbbf24;
    --warn-light: #3a3020;
    --ok: #4ade80;
    --ok-light: #203a28;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app {
  display: flex;
  min-height: 100vh;
}

.app[hidden] {
  display: none;
}

.login-screen {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
  padding: 20px;
}

.login-screen[hidden] {
  display: none;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

.login-brand {
  justify-content: center;
  margin-bottom: 24px;
}

.login-submit {
  width: 100%;
  margin-top: 6px;
}

.login-hint {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 18px;
}

.session-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0 8px 10px;
}

.session-label {
  font-size: 12px;
  color: var(--text-muted);
}

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 8px 20px;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
}

.brand-name {
  font-weight: 700;
  font-size: 16px;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-btn {
  text-align: left;
  padding: 10px 12px;
  border: none;
  background: transparent;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-muted);
  cursor: pointer;
  font-weight: 500;
}

.nav-btn:hover {
  background: var(--bg);
  color: var(--text);
}

.nav-btn.active {
  background: var(--primary-light);
  color: var(--primary-dark);
}

.sidebar-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ghost-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  padding: 9px 10px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  text-align: center;
}

.ghost-btn:hover {
  background: var(--bg);
  color: var(--text);
}

.file-label {
  display: block;
}

.content {
  flex: 1;
  padding: 28px 36px;
  min-width: 0;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.view-header h1 {
  font-size: 22px;
  margin: 0;
}

.primary-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.primary-btn:hover {
  background: var(--primary-dark);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-card.warn .stat-value {
  color: var(--warn);
}

.stat-value {
  font-size: 26px;
  font-weight: 700;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.panel h2 {
  margin: 0 0 14px;
  font-size: 16px;
}

.search-input {
  width: 100%;
  max-width: 360px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  margin-bottom: 16px;
}

.table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

thead th {
  text-align: left;
  padding: 12px 16px;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: var(--bg);
}

.row-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.icon-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 15px;
  padding: 4px 8px;
  border-radius: 6px;
}

.icon-btn:hover {
  background: var(--bg);
  color: var(--text);
}

.icon-btn.danger:hover {
  background: var(--danger-light);
  color: var(--danger);
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.badge.ok {
  background: var(--ok-light);
  color: var(--ok);
}

.badge.warn {
  background: var(--warn-light);
  color: var(--warn);
}

.badge-toggle {
  border: none;
  cursor: pointer;
}

.tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 12px;
  margin: 2px 3px 2px 0;
}

.empty-hint {
  text-align: center;
  color: var(--text-muted);
  padding: 30px 0;
}

.kurslisten-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.filter-bar .search-input {
  margin-bottom: 0;
  flex: 1;
  min-width: 220px;
}

.filter-select {
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  min-width: 140px;
}

tr.kurs-abgelaufen {
  opacity: 0.6;
}

.filter-checkbox {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-muted);
  white-space: nowrap;
}

.field-note {
  font-size: 12px;
  color: var(--text-muted);
  margin: -8px 0 14px;
}

.checkbox-label {
  flex-direction: row !important;
  align-items: center;
  gap: 8px !important;
  cursor: pointer;
  margin-bottom: 14px;
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.checkbox-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
}

.checkbox-grid .checkbox-label {
  margin-bottom: 0;
}

.form-error {
  color: var(--danger);
  background: var(--danger-light);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 13px;
  margin-top: 4px;
}

.kalender-toolbar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}

.kalender-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.kalender-week-label {
  font-weight: 600;
  margin-left: 6px;
}

.kalender-saal-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.kalender-saal-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
}

.kalender-datum {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 11px;
}

.kalender-trainer {
  color: var(--primary-dark);
  opacity: 0.8;
}

.kalender-scroll {
  max-height: 65vh;
  overflow: auto;
}

.kalender-table thead th {
  position: sticky;
  top: 0;
  background: var(--surface);
  z-index: 2;
}

.kursliste-panel h2 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.kursliste-meta {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-muted);
}

.kalender-table th:first-child,
.kalender-table td.kalender-saal {
  position: sticky;
  left: 0;
  background: var(--surface);
  font-weight: 600;
  z-index: 1;
}

.kalender-table th:first-child {
  z-index: 3;
}

.kalender-cell {
  min-width: 140px;
  vertical-align: top;
}

.kalender-entry {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: 6px;
  padding: 5px 8px;
  margin-bottom: 4px;
  font-size: 12px;
  line-height: 1.4;
}

.kalender-entry:last-child {
  margin-bottom: 0;
}

.kalender-entry .kalender-time {
  font-weight: 700;
  margin-right: 6px;
}

.kalender-cell.kalender-ferien {
  background: var(--bg);
}

.kalender-ferien-head {
  color: var(--text-muted);
  font-weight: 400;
}

.kalender-ferien-name {
  font-size: 10px;
  font-weight: 600;
  color: var(--danger);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.settings-panels {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.panel-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.panel-header-row h2 {
  margin: 0;
}

.panel-hint {
  font-size: 13px;
  color: var(--text-muted);
  margin: -6px 0 14px;
}

.radio-row {
  display: flex;
  gap: 18px;
  margin-bottom: 4px;
}

.radio-row .checkbox-label {
  margin-bottom: 0;
}

.rollen-header {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.rollen-header h3 {
  margin: 0;
  font-size: 15px;
}

.ausfall-add-row {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.ausfall-add-row input[type="date"] {
  flex: 1;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

.ausfaelle-liste {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ausfall-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--warn-light);
  color: var(--warn);
  border-radius: 999px;
  padding: 3px 6px 3px 10px;
  font-size: 12px;
}

.ausfall-remove {
  background: transparent;
  border: none;
  color: inherit;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  padding: 0 4px;
}

.ausfaelle-empty {
  font-size: 13px;
  color: var(--text-muted);
}

.kursplan-stunde {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 10px;
}

.kursplan-stunde-kopf {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.kp-notiz-feld {
  width: 100%;
  margin-top: 8px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  resize: vertical;
}

.protokoll-status-icon {
  font-size: 15px;
}

.soll-ist-vergleich {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 18px;
}

.soll-ist-spalte {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  background: var(--bg);
}

.soll-ist-spalte h3 {
  margin: 0 0 10px;
  font-size: 14px;
}

.soll-ist-liste {
  list-style: none;
  margin: 0 0 8px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.soll-ist-eintrag {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  font-size: 13px;
}

.soll-eintrag-klickbar {
  cursor: pointer;
}

.soll-eintrag-klickbar:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.soll-ist-kommentar {
  margin: 0;
  font-size: 12px;
}

.ist-kommentar-feld {
  flex: 1;
  min-width: 80px;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font-size: 12px;
  font-family: inherit;
}

.tanz-add-row select,
.tanz-add-row input {
  flex: 1;
  min-width: 0;
}

.mini-tanz-liste {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 12px;
}

@media (max-width: 800px) {
  .soll-ist-vergleich { grid-template-columns: 1fr; }
}

.attendance-cell {
  text-align: center;
}

.heute-spalte {
  background: var(--primary-light);
}

thead th.heute-spalte {
  color: var(--primary-dark);
}

.fortlaufend-lade-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.fortlaufend-lade-row .field-note {
  margin: 0;
  text-align: center;
  flex: 1;
}

.fortlaufend-scroll {
  scroll-behavior: auto;
}

.attendance-cell input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.kalender-entry.conflict {
  background: var(--danger-light);
  color: var(--danger);
}

.kalender-entry.kalender-blocked {
  background: var(--bg-alt, #e5e5e5);
  color: var(--text-muted, #555);
  border: 1px dashed var(--border, #999);
  cursor: pointer;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}

.modal-overlay[hidden] {
  display: none;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius);
  width: 100%;
  max-width: 660px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--surface);
}

.modal-header h2 {
  font-size: 17px;
  margin: 0;
}

.modal-body {
  padding: 20px;
}

.field {
  margin-bottom: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
}

.field input,
.field select,
.field textarea {
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 18px;
}

.secondary-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
}

.danger-btn {
  background: var(--danger);
  color: #fff;
  border: none;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 200;
}

@media (max-width: 800px) {
  .app { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; flex-direction: row; align-items: center; flex-wrap: wrap; }
  .nav { flex-direction: row; flex-wrap: wrap; }
  .sidebar-footer { flex-direction: row; margin-top: 0; margin-left: auto; }
  .content { padding: 20px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .field-row { grid-template-columns: 1fr; }
}